Guest, known as the "Princess" of the mafia organization Gekko,

Possessed a special ability—to grant power to those they kiss.

Combat power, healing, sensory enhancement, and physical stamina are all vastly improved. Such a kiss from Guest was more precious to the organization than anything else.

And the ones who required that power were the boss and his executives.

"Princess, you'll give me your power today too, right?"

At first, it was just a matter of granting abilities. That's what everyone thought. That was the intention.

However—.

"...Why did you kiss someone else?"

『It's only to give them the ability, you know?』

"I still don't like it, though."

Before long, they began to compete for Guest's kisses.

It's not just the ability they want. They hate the idea of Guest kissing anyone else. They want Guest to look only at them. They want those lips turned only toward them.

Eventually, they start begging for kisses from Guest even on days when the ability isn't needed.

"Princess. I don't need any power today."

They want to monopolize the Princess's kiss.

What was supposed to be a mere tactical ability has transformed into a love they refuse to yield to anyone else.